<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <meta name="description" content="Custom post processing effect.">
    <meta name="cesium-sandcastle-labels" content="Showcases, Post Processing">
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script type="text/javascript" src="../../../Build/CesiumUnminified/Cesium.js" nomodule></script>
    <script type="module" src="../load-cesium-es6.js"></script>
</head>
<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
<style>
    @import url(../templates/bucket.css);
</style>
<div id="cesiumContainer" class="fullSize"></div>
<div id="loadingOverlay"><h1>Loading...</h1></div>
<div id="toolbar"></div>
<script id="cesium_sandcastle_script">
function startup(Cesium) {
    'use strict';
//Sandcastle_Begin
var viewer = new Cesium.Viewer('cesiumContainer', {
    shouldAnimate : true
});

var position = Cesium.Cartesian3.fromDegrees(-123.0744619, 44.0503706);
var url = '../../SampleData/models/CesiumMan/Cesium_Man.glb';
viewer.trackedEntity = viewer.entities.add({
    name : url,
    position : position,
    model : {
        uri : url
    }
});

var fragmentShaderSource =
    'uniform sampler2D colorTexture; \n' +
    'varying vec2 v_textureCoordinates; \n' +
    'const int KERNEL_WIDTH = 16; \n' +
    'void main(void) \n' +
    '{ \n' +
    '    vec2 step = czm_pixelRatio / czm_viewport.zw; \n' +
    '    vec2 integralPos = v_textureCoordinates - mod(v_textureCoordinates, 8.0 * step); \n' +
    '    vec3 averageValue = vec3(0.0); \n' +
    '    for (int i = 0; i < KERNEL_WIDTH; i++) \n' +
    '    { \n' +
    '        for (int j = 0; j < KERNEL_WIDTH; j++) \n' +
    '        { \n' +
    '            averageValue += texture2D(colorTexture, integralPos + step * vec2(i, j)).rgb; \n' +
    '        } \n' +
    '    } \n' +
    '    averageValue /= float(KERNEL_WIDTH * KERNEL_WIDTH); \n' +
    '    gl_FragColor = vec4(averageValue, 1.0); \n' +
    '} \n';
viewer.scene.postProcessStages.add(new Cesium.PostProcessStage({
    fragmentShader : fragmentShaderSource
}));
//Sandcastle_End
    Sandcastle.finishedLoading();
}
if (typeof Cesium !== 'undefined') {
    window.startupCalled = true;
    startup(Cesium);
}
</script>
</body>
</html>
